Improvement in lasting-machines



5 Sheets-Sheet R. (J. LAMBART. Lasting-Machines.

No. 216,685. nted June17,l879.

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- Witnesses: Inventor: I

5 Sheets-Sheet 4.";

R. 0. LAMBART. Last.ing-Ma.ohines.-

Paten ted June-17, 1879.

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MPETERS, FHDTO-LHNQGRAPHER, WASHINGTON. D. O,

UNITED STATES PATENT OFFIeE.

RICHARD G. LAMBART, OF BRIDGEWATER, MASSACHUSETTS.

IMPROVEMENT IN LASTlNG-MACHINES.

Specification forming part of Letters Patent No. 216,685, dated June 17,1879; application filed May 12, 1879.

To all whom it may concern:

Be it known that I, Brennan 0. LAMBART, of Bridgewater, in the county ofPlymouth and State of Massachusetts, have invented certain new anduseful Improvements in Boot and Shoe Lasting Machines, of which thefollowing, taken in connection with the accompanying drawings, is aspecification.

My invention relates to a machine for stretching the upper of a boot orshoe onto the last and turning its edge over upon the treadsurfacethereof in position to be secured to the inner sole, and is animprovement upon the inventh 11 described in Letters Patent No. 167,676,granted to me September 14,1875; and it consists in the construction,arrangement, and combination of devices for assisting in the turningover and crimping of the leather around the heel and toe of the last,and for expanding the elastic band, which will be best understood byreference to the description of the drawings, in which-- Figure l is aplan of my improved machine. Fig. 2 is a front elevation. Fig. 3 is anend elevation, with the hand-wheel for operating the heel and toecrimping fingers removed. Fig. 4 is a horizontal section on line a w onFigs. 2 and 3. Fig. 5 is a horizontal section 011 line 3 you Fig. 3,looking upward. Fig. 6 is a partial vertical transverse section on line2 2 on Figs. 2 and 4.; and Fig. 7 is a vertical section of one of thestandards which support and carry the toggle-operating shafts, show ingthe last-supporting post in elevation.

A is the table or bed of the machine, supported upon the legs B B, andhaving adjust ably secured thereto, so as to be moved transversely ofsaid table in suitable guides formed for the purpose, two plates, G andO, which platesextendfrom end to end of the table A, and are secured inthe desired position by the screw-bolts a and a, which pass throughslots b and b, respectively, in the table A, as shown in Fig. 5.

The plates 0 and C have formed upon their upper sides the raised guidesc and c, to which are fitted the stands or plates D and E, and D and E,respectively, which are secured to the plates 0 and G by screw-bolts dpassing through slots in said stands, in such a manner that said standsmay be adjusted in the direction of the length of the machine, for thepurpose of adapting the machine to a larger or smaller shoe.

The table A also has formed upon its upper side, between the plates Gand O, a raised rib or guide, F, to which are fitted the two plates orstands F and E, which are adjustably secured to the table A by means ofthe screwbolts 0 e passing through slots in said stands.

In the under side of the table A is formed a longitudinal groove orguide-way, to receive the two plates G and G, adjustably secured to thetable by means of the screw-bolts ff, which pass through slots in saidplates and are screwed into the table A.

Each of the plates G and G has formed upon its upper side acylindricalhub, g or g, which projects upward through a slot, h,extending lengthwise of the table, and forms a bearing for the verticalshaft 1' or i, upon the upper end of which is formed or secured the diskj or j, and upon the lower end of which is secured the segment of aworm-wheel, H or H, the teeth in which engage with the thread of theworm-shaft I, by the revolution of which the disks j and j may bepartially rotated about their axes.

The worm-shaft I is mounted in bearings I and I and has secured upon itsouter end the wheel or pulley I, by means of which or a crank-pin orhandle set therein said shaft may be revolved.

J, K, J, K, J and K are standards, pivoted at their lower ends to thestands or plates D, E, D, E, F, and F respectively, and. each havingpivoted to its upper end a lever, is, the inner end of which is madebroad or pad-shaped, while its opposite end is provided with a handle ora link-connection for imparting motion thereto.

Each of the levers It has pivoted to it a secondary lever, l, alsohaving a pad-shaped iuner end, which serves, in conjunction with thelever 70, to form a clamp, between the two jaws of which is firmly heldthe endless band of rubber L, the jaws of said clamp being adjusted bythe screw m set in the lever k, and acting upon the outer end of thelever lto force the outer ends of said levers apart and cause the innerpad-like ends to gripe the rubber band L with sufficient pressure tohold it securely therein.

The uprights or standards J, K, J, K, J and K are each provided with ahorizontal rod or bolt, 1, fitted to and adapted to be moved endwise ina bearing formed for the purpose in said standard, and having formedupon its inner end a shoulder, a, to bear against the inner face of the.standard, and provided upon' its outer end with a nut, n between whichand the outer face or side of the standard is placed the spiral springa, which serves to press the standard inward toward the shoulder n onthe rod n, as said rod is moved inward, and to permit said rod to. bemoved through the standard when the elastic band L comes in contact withthe upper on the last.

The disk j has pivoted thereto by pins three toggle-links, 0, 0, and 0the opposite ends of which are pivoted by pins 0 to the inner ends ofthe rods n in the uprights J, J and J respectively; and the disk j issimilarly connected by the toggle-links p, 10 and p to the uprights K,K, and K M is a heel-post for supporting the last, made in three parts,jointed together to permit endwise movement of the last, and set in asuitable socket formed in the upper end of the shaft i, the toe of thelast being supported by the flanges L of the band L.

N is an arm, pivoted at q to the top of the standard N so that it may bepartially r0- tated in a horizontal plane about said pivot, and hearingat its rear end upon the top of the standard M, its opposite end beingprovided with the set-screw Nfl'to bear upon the tread-surface of thelast to hold it firmly in position during the operation of stretchingthe upper over the last.

The standard J 2 has firmly secured thereto, so as to move therewith,two arms, 0 and 0, to each of which are pivoted two levers, 0 the upperends of which are provided with spring-fingers r, notched at their innerends, and designed to assist in crimping the upper and pressing it downupon the last around the heel portion thereof.

In like manner the standard K has rigidly secured thereto the two arms Pand P to each of which are pivoted two levers, P to the upper end ofwhich are secured the springfingers r, notched at their inner ends, anddesigned to assist in crimping and pressing the upper down around thetoe of the last.

The lower ends of the levers O are connected by the links s s and s andthe swivels t t to the nut-block R, fitted to and adapted to be movedupon the threaded shaft S; and the lower ends of the levers P aresimilarly connected by the links a u and u and swivels t t to thenut-block R, fitted to and adapted to be moved upon the opposite end ofthe shaft S, the screw-threads upon said shaft being cut one halfright-handed, and the other half left-handed, so that a revolution ofthe screw-shaft will cause the nuts It and R" to be moved toward or fromeach other, accord ing to which way the shaft is revolved, and thuscontrol the movements of the spring-fin gers r and r.

The operation of my improved machine is as follows: The arm N beingswung into the posi' tion indicated in dotted lines in Fig. 1, and; theelastic band L being expanded, as shown, the last, with the uppersurrounding it, is placed in position on the heel-post M, and theband Lis allowed to contract till it presseshard upon the upper, which is doneby revolving the wornrshaft I, so as to break the toggles and move theupper ends of the standards J, J J K, K and K inward. The arinN is thenswung into position shown in full lines in Fig. l, and the screw N isset down upon the tread-surface of the last, or the inner sole securedthereto, to hold the last firmly in position, while the elastic band israised up to the tread-surface of the last. The levers k k are thenmanipulated to raise said elastic band along the sides of the last,pressing at the same time the upper hard against the last, till aportion of the band is above the corner of the last, and by itscontractile properties presses the upper over upon the inner solesecured upon the tread-surface of the last, the two rear levers, k k,being operated through the medium of the hand-levers T T, pivoted to thefront of the table, the links T and T and the elbow-levers T Thespring-fingers r and 4", which were previously thrown back to permit theintroduction of the last and shoe, are now brought forward upon thepartially-folded upper by revolving the screw-shaft S, so as to forcethe nuts R andR apart, the fingers 1" and r serving to complete thefolding and crimping of the upper around the toe and heel of the last,and hold it in position till it is secured by tacking or otherwise.

The screw-shaft S is supported entirely by the nuts R and R or withoutother bearing, and therefore the two sets of fingers r and r are free toaccommodate themselves to the surface of the last or variations in thethickness of the leather-as, for instance, if the fingers 1 come to abearing upon the upper around the heel of the last before the fingers rcome to a similar bearing upon the leather around the toe of the last,the motion of the nut R and the levers connected therewith will cease,the shaft S being moved endwise and moving the nut R with double speedtill the fingers r are brought to a bearing upon the leather around thetoe of the last and the pressure becomes equal at both ends of the last.

When the fingers r and T have forced the leather around the heel and toeof the last down firmly upon the inner sole the screw N w ends of thelevers k k are raised to depress the elastic band L, and the lasted shoeis removed from the machine.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is-

1. In a machine for lasting boots and shoes, the combination of i anendless band or ring of rubber or other suitable elastic material,adapted to surround the last at ornearits treadsurface, with its inneredge pressing against the upper upon the last, mechanism,substantiallysuch as described, for raisin g and lowering said elasticband along the sides thereof, and causing it to press the upper overupon the inner sole, and a series of crinipin g-fingers arranged aroundthe heel of the last, and adapted to be niech anicallymoved inward anddownward upon the partiallytblded edge of the upper and press it firmlyupon the inner sole, substantially as described.

2. In combination with the elastic band L, arranged to surround thelast, and adapted to press against the upper thereon at or near thetread-surface thereof, and mechanism, substantially such as described,for raising and lowering said elastic band along the sides of said last,a series of crimping fingers arranged around the toe of the last, andadapted to be mechanically moved inward and downward upon thepartly-folded upper and press it upon the inner sole, substantially asdescribed.

3. The combination, in a boot and shoe lasting machine, of the standardsJ, J J K, K, and K levers k k and l l, set-screws m m, and

ring of rubber L, the two end standards J and K provided at their upperends with means of clamping said band or ring, and also provided,respectively, with two arms, 0 and O and P and P levers 0 andPflspring-fingcrs r and r, nuts R and It, connected, respectively, to

the lower ends of the levers O and P and the shaft S, having formedthereon a right-hand and a left-hand thread, all arranged and adapted tooperate substantially as described.

6. The combination of the endless band of rubber L, clamp -levers k 1,standards J J 1 J K K K rod n, spring a diskj or j, and toggle-linkspivoted at one end to said disk or disks and at the other end to the rodor rods 41, substantially as described.

Executed at Boston, Massachusetts, this 9th day of May, A. D. 1879.

RICHARD (J. LAMBART. Witnesses:

N. G. LOMBARD, E. A. HEMM'ENWAY.

